Advent calendar



FIG. 1 is a perspective view of an advent calendar showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view of thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a section view taken through section line 8-8 in FIG. 6;

FIG. 9 is a perspective view of the advent calendar shown in an alternate position;

FIG. 10 is a front view of FIG. 9;

FIG. 11 is a back view of FIG. 9;

FIG. 12 is a right side view of FIG. 9;

FIG. 13 is a left side view of FIG. 9;

FIG. 14 is a top view of FIG. 9;

FIG. 15 is a bottom view of FIG. 9; and,

FIG. 16 is a section view taken through section line 16-16 in FIG. 14.

The broken lines illustrate portions of the advent calendar and form no part of the claimed design. 

CLAIM The ornamental design for a advent calendar, as shown and described. 